There's one big reason Trump wouldn't want to go after Amazon

Amazon founder and CEO Jeff Bezos laughs as he talks to the media while touring the new Amazon Spheres during the grand opening at Amazon's Seattle headquarters in Seattle, Washington, U.S., January 29, 2018. Reuters/Lindsey Wasson

President Donald Trump has lobbed attacks against Amazon over its taxes and what it pays the Post Office for days.

Isaac Boltansky, a policy analyst at research and trading firm Compass Point, noted Tuesday the White House's silence on an actual plan despite repeated bluster from Trump. He said it would likely stay that way.

"Attacking Amazon damages broader market indices, which the president has repeatedly touted as one of his primary gauges of success," Boltansky wrote. "Amazon is approximately 2.5% of the S&P 500 and the president's personal vendetta against the company is surely a component of broader market anxieties."

Given Trump's obsession with the market, said Greg Valliere, the chief global strategist at Horizon Investments, the drop-off should give the president pause before moving forward with the Amazon fight.

"A plunging stock market is not a victory, and Trump must realize that he suddenly is vulnerable with investors," Valliere wrote Tuesday.

"The headline risk for Amazon is likely to continue for as long a President Trump calls the White House home, but we doubt his personal antipathy for Jeff Bezos will translate into actual policy," Boltansky said, referring to the Amazon CEO.